The blueprint itself has existed before, but since Unreal 4, the blueprint has become the overall programming tool for Unreal. Blueprint development is convenient, easy to use for novices, high development efficiency, rapid prototyping can be carried out, game developers can completely use the blueprint system to develop a game. Unreal developers also position Blueprint and C++ side by side as the two pillars of development. However, the blueprint system itself has some disadvantages. The blueprint consumes more CPU performance than C++, and its maintenance is more complicated. For secondary development, C++ is still needed, and this new programming method may make it difficult for old programmers to get started.
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